B - Operations – Transporting – 23 – P
Patent
B - Operations, Transporting
23
P
26/146
B23P 15/26 (2006.01) B21D 26/02 (2006.01) B21D 53/02 (2006.01)
Patent
CA 1139535
METHOD AND APPARATUS FOR PRODUCING A HEAT EXCHANGER TUBE ABSTRACT OF THE DISCLOSURE Method and apparatus is disclosed for producing a spine fin heat exchanger in which the density of the spine fins is greater along the portions of the passes within the pattern of high flow of air or the like across the heat exchanger. Those portions of the tubing at the bends and outside such pattern are formed with a lower spine fin density. Such lower density outside the patterns and at the bends does not materially reduce the overall heat exchange capacity of the heat exchanger, and results in a heat exchanger where less material and time are required to form the heat exchanger without any significant loss in its capacity. The heat exchanger is preferably formed by chang- ing the rate of feed of the tube as it feeds through the winding head to increase the amount of stretch of the spine fin strip along the zones of low density compared to the amount of stretch in the strip along the zone of high den- sity. Consequently, the same amount of material is required for each wrap along both zones.
400499
Venables Herbert J. III
Venables Herbert J. IV
Gowling Lafleur Henderson Llp
Venables Herbert J. III
Venables Herbert J. IV
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